Ice-making machinery.



No. 659,554. Pz ltented Oct. 9, I900.

T. SHIPLEY.

ICE MAKING MACHINERY;

(Applicafim filed Jung 2, 1900.) (No Model.)

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UNTTTQD STATES PATENT UFFICEt.

THOMAS SHIPLEY, OF YORK, PENNSYLVANIA.

ICE-'MAKING MACHINERY.

SPECIFICATION forming part of Letters Patent N0. 659,554, dated October 9, 1900.

Application filed June 2, 1900. Serial No. 18,868. (No model.)

To all whom it may concern:

Be it known that I, THOMAS SHIPLEY, a citizen of the United States, residing at York, in the county of York and State of Pennsylvania, have invented a certain new and useful Improvement in Ice-Making Machinery, of which the following is a specification.

My invention relates to that class of icemaking machines in which the refrigerant, such as ammonia, is kept in circulation in a pipe-circuit connected with a condenser, to which the ammonia after having done its work in the freezing appliances is returned by means of one or more compressors. In this class of machines it is usual to cool the water to be made into ice before admitting it into the portion of the apparatus Where it is frozen.

It is my object to provide efficient and economical means for regularly and uniformly cooling the water to 32 and at the same time extracting from it all or the greater part of the latent heat which it still contains at this temperature before admitting it to the freezing apparatus.

To this end my invention consists of the parts and combinations, which will first be described in connection with the accompanying drawing and will then be more particularly pointed out in the claim.

The drawing is a representation, largely diagrammatic, of an apparatus embodying my invention.

A is the condenser for the ammonia or other refrigerant.

B B are two singleacting compressors driven in the usual way.

0 is the freezing-tank, in this instance of the can type, containing the usual freezing appliances.

The pipe-circuit through which circulates the refrigerant which freezes the Water and makes ice includes the compressor B and the freezing appliances and may be traced as follows: Starting from the outlet end of the condenser, the pipe 1 leads into the reservoir X, at which point it has a controlling-valve m. Thence the pipe-circuit continues through the pipe 2 to and through the freezing-tank C in the usual manner, thence out through the pipe 3 to the compressor B, and thence through pipes i 5 to the inlet end of the condenser. Pipe 2 is provided with a reducing-valve y,

pressure in that portion of said circuit be tween the valve vy and the compressor B.

The ammonia in this portion of the circuit is expanded to about fifteen pounds pressure above atmospheric or thirty pounds absolute pressure and when thus expanded is at a very low temperature, very far below the freezingpoint.

The tank containing the preliminarilycooled water is shown at D, and the water is carried from it to the freezing-tank 0 through a pipep. The supply of water is drawn through a pipe at from any usual or suitable source and after passing through the cooling appliances is stored in the tank D.

The cooling of the water is effected not directly by the ammonia or other refrigerant, but indirectly through the instru mentality of brine, which is first cooled by the refrigerant and then in turn cools the water. In this way I am enabled to cool the water uniformly and regularly without liability of freezing it or of forming ice in thecoolirig-pipes. To this end the cooling-pipe circuit from condenser A includes the compressor B and brine-cooling appliances and may be traced as follows: starting from the outlet end of the condenser A through pipe 1 to reservoir X, thence through reducing-valve z and pipe 6 to and through the outer space or jacket of a jacketed coil Z, thence through pipe 7 to the compressor B, and thence through pipes 8 5 back to the condenser. The reducing-valve z is the instrumentality through which the back pressure of the refrigerant in the cooling-circuit just traced is regulated. The back pressure in this circuit, to secure the best results, should be preferably about forty pounds above atmospheric or fiftyfive pounds absolute, at which temperature the brine will be sufficiently reduced in temperature to cool the water down to 32 and at the same time to extract from it much of the latent heat, doing this with great regularity and uniformity and without danger of forming ice in the water-pipes.

The brine-circuit includes a pump E and pipe connections 12 13 14, by means of which the brine is caused to circulate first through the inner pipe of the jacketed brine-cooling coil Z, where it is cooled by the action of the refrigerant, and thence, by way of the pump E, through the outer pipe orjacket of a jacketed coil m, where it in turn cools the water which from pipe at circulates through the inner pipe of coil m, and thence passes, thoroughly cooled, to the tank D.

The improvement above described is applicable to any kind of ice-making plant,whether the can system illustrated in the drawing, the plate system, the block system, 850. Also in lieu of two singlefacting com: pressors I may employ one double-acting compressor, connecting the freezing-pipe circuit to one side of the compressor and thecoolingpipe circuit to the other side of the compressor.

What I claim herein as new, and desire to secure by Letters Patent, is-

In machinery for making ice the combination, substantially as set forth of the following elements: a refrigerant-condenser; com- In testimony whereof I have hereunto set my hand this 28th day of May,'1900.

THOMAS SHIPLEY.

Witnesses:

A. B. STRIOKLER, E. W. GARDNER. 

